Brett and Naghmeh King are due to begin a press conference at 10am UK time this morning following their release from Spanish prison last night.
ITV News reporter Sejal Karia is in Seville:
Ashya King's parents expected to give a news conference in Seville in 30 mins after being freed frm jail last night. http://t.co/gu9ots9Dvz
The head of the police force which applied for a European Arrest warrant against the parents of Ashya King has now urged their release.
A British mother whose son's life was saved by proton therapy has told ITV that she defied NHS doctors' advice to pursue the treatment.
The parents of Ashya King said they took him out of a hospital to seek proton beam treatment which is not available under the NHS.